WO2018173914A1

WO2018173914A1 - Wheel loader and method for changing counterweight mounting position

Info

Publication number: WO2018173914A1
Application number: PCT/JP2018/010172
Authority: WO
Inventors: 正英榊原; 亨内藤; 遼平菊澤
Original assignee: 株式会社小松製作所
Priority date: 2017-03-24
Filing date: 2018-03-15
Publication date: 2018-09-27
Also published as: EP3546661A4; JP7133542B2; EP3546661A1; JPWO2018173914A1; EP3546661B1

Abstract

A wheel loader (1) comprises a vehicle frame (10), a right counterweight (32) mounted to the vehicle frame (10) so as to be removable, and a left counterweight (33) mounted to the vehicle frame (10) so as to be removable. The vehicle frame (10) has a first right counterweight mounting hole (32a), a second right counterweight mounting hole (32b), a first left counterweight mounting hole (33a), and a second left counterweight mounting hole (33b).

Description

Wheel loader and counterweight mounting position change method

The present invention relates to a method for changing a mounting position of a wheel loader and a counterweight.

In the wheel loader, a counterweight as a balance weight is attached to the rear end portion of the vehicle body frame (see, for example, Patent Document 1).

JP 2004-291694 A

On the other hand, there is a request to change the mounting position of the counterweight according to the scene where the wheel loader is used.

The present invention has been made in view of the above situation, and an object thereof is to provide a wheel loader and a counter weight mounting position changing method capable of changing the mounting position of the counter weight.

The wheel loader according to the present invention includes a vehicle body frame, a right counterweight that is detachably attached to the vehicle body frame, and a left counterweight that is detachably attached to the vehicle body frame. The vehicle body frame has a first right counter weight mounting hole for mounting a right counter weight, a second right counter weight mounting hole for mounting a right counter weight, and a first left counter weight for mounting a left counter weight. And a second left counterweight mounting hole for mounting the left counterweight.

According to the present invention, it is possible to provide a wheel loader capable of changing the mounting position of the counterweight and a method for changing the mounting position of the counterweight.

Wheel loader side view Rear view of wheel loader Rear view of wheel loader (front view of counterweight) Wheel loader top view Rear view of wheel loader (front view of counterweight) Wheel loader top view AA sectional view of FIG. 3A BB sectional view of FIG. 4A Rear view of wheel loader according to another embodiment Rear view of wheel loader according to another embodiment

(Configuration of wheel loader 1)
Drawing 1 is a side view showing wheel loader 1 concerning an embodiment. In the following description, “right”, “left”, “front”, “rear”, “upper”, and “lower” are terms based on an operator who operates the wheel loader 1. The “vehicle width direction” is synonymous with the “left-right direction”.

The wheel loader 1 is used for transporting excavated earth and sand and loading it on a truck or the like. The wheel loader 1 includes a front frame 2, a rear frame 3, and a steering cylinder 4. The front frame 2 and the rear frame 3 constitute a body frame 10 of the wheel loader 1.

The front frame 2 is connected to the rear frame 3 via pins (not shown). By extending and retracting the steering cylinder 4, the front frame 2 can swing within a predetermined articulate angle range with respect to the rear frame 3.

The lift cylinder 21 and the boom 22 are connected to the front frame 2. As the lift cylinder 21 expands and contracts, the bucket 24 moves up and down together with the boom 22. A tilt cylinder 23 is connected to the boom 22. As the tilt cylinder 23 expands and contracts, the bucket 24 tilts via the bell crank 25 and the link 26. The bucket 24 is an example of a work machine attached to the wheel loader 1. Examples of working machines include buckets, forks, and snow removal blades.

The rear frame 3 is disposed behind the front frame 2. A cab 31 is disposed on the rear frame 3. The rear frame 3 supports an engine, a transmission, a hydraulic pump, and the like (not shown). The driving force of the engine is transmitted to the front wheels 20 and the rear wheels 30 via a driving force transmission path (not shown).

The right counterweight 32 and the left counterweight 33 are detachably attached to the rear end portion of the rear frame 3. However, only the left counterweight 33 is shown in FIG.

(Right counterweight 32 and left counterweight 33 mounting position)
The mounting positions of the right counterweight 32 and the left counterweight 33 will be described with reference to the drawings.

FIG. 2 is a rear view of the wheel loader 1. FIG. 2 shows a state in which the right counterweight 32 and the left counterweight 33 are removed from the vehicle body frame 10 (specifically, the rear frame 3).

FIG. 3A is a rear view of the wheel loader 1 with the right counterweight 32 attached to the first right position and the left counterweight 33 attached to the first left position. FIG. 3A is a front view of the counterweight. FIG. 3B is a top view of the right counterweight 32 attached to the first right position and the left counterweight 33 attached to the first left position.

FIG. 4A is a rear view of the wheel loader 1 with the right counterweight 32 attached to the second right position and the left counterweight 33 attached to the second left position. FIG. 4A is a front view of the counterweight. FIG. 4B is a top view of the right counterweight 32 attached to the second right position and the left counterweight 33 attached to the second left position.

As shown in FIG. 2, the vehicle body frame 10 includes a rear plate 11, a right side plate 12, and a left side plate 13.

The rear plate 11, the right side plate 12, and the left side plate 13 are each formed in a plate shape. The rear plate 11 is erected along the vehicle width direction. The rear plate 11 extends in the vehicle width direction and the vertical direction. The

counterweights

32 and 33 are in contact with the rear plate 11. The right side plate 12 and the left side plate 13 are erected along the front-rear direction. The right side plate 12 and the left side plate 13 extend in the front-rear direction and the vertical direction, respectively.

As shown in FIG. 2, the rear plate 11 includes three first right counterweight mounting holes 32a, three second right counterweight mounting holes 32b, three first left

counterweight mounting holes

33a, and 3 There are two second left counterweight mounting holes 33b.

Each first right counterweight mounting hole 32a is used to mount the right counterweight 32 at the first right position, as shown in FIGS. 3A and 3B. The first right position is located to the right of the center line CL indicating the center of the body frame 10 in the vehicle width direction. Each second right counterweight mounting hole 32b is used to mount the right counterweight 32 at the second right position, as shown in FIGS. 4A and 4B. The second right position is located to the right of the center line CL. As can be seen by comparing FIGS. 3A and 3B and FIGS. 4A and 4B, the second right position is offset from the first right position inward in the vehicle width direction. Accordingly, as shown in FIG. 2, each second right counterweight mounting hole 32b is positioned inside each first right counterweight mounting hole 32a in the vehicle width direction. In the present embodiment, each second right counterweight mounting hole 32b is formed at a position translated from the first right counterweight mounting hole 32a inward in the vehicle width direction. The distance between each first right counterweight mounting hole 32a and each second right counterweight mounting hole 32b is not particularly limited.

Each first left counterweight mounting hole 33a is used for mounting the left counterweight 33 at the first left position, as shown in FIGS. 3A and 3B. The first left position is located to the left of the center line CL indicating the vehicle width direction center of the body frame 10. Each second left counterweight mounting hole 33b is used to mount the left counterweight 33 at the second left position, as shown in FIGS. 4A and 4B. The second left position is located to the left of the center line CL. As can be seen by comparing FIGS. 3A and 3B and FIGS. 4A and 4B, the second left position is offset from the first left position inward in the vehicle width direction. Therefore, as shown in FIG. 2, each second left counterweight mounting hole 33b is positioned inside each first left counterweight mounting hole 33a in the vehicle width direction. In the present embodiment, each second left counterweight attachment hole 33b is formed at a position translated from the first left counterweight attachment hole 33a inward in the vehicle width direction. The distance between each first left counterweight mounting hole 33a and each second left counterweight mounting hole 33b is not particularly limited.

The right counterweight 32 (see FIGS. 3A and B) attached to the first right position is located on the outer side in the vehicle width direction than the right counterweight 32 (see FIGS. 4A and B) attached to the second right position.

Similarly, the left counterweight 33 (see FIGS. 3A and B) attached to the first left position is more outward in the vehicle width direction than the left counterweight 33 (see FIGS. 4A and B) attached to the second left position. To position.

3A and 4A, the right counterweight 32 has three right bolt insertion holes 32c. Each fastening bolt 32d is inserted through each right bolt insertion hole 32c. The right counterweight 32 is fixed to the vehicle body frame 10 by fastening each fastening bolt 32d to each first right counterweight attachment hole 32a or each second right counterweight attachment hole 32b.

Similarly, as shown in FIGS. 3A and 4A, the left counterweight 33 is formed with three left bolt insertion holes 33c. Each fastening bolt 33d is inserted through each left bolt insertion hole 33c. The left counterweight 33 is fixed to the vehicle body frame 10 by fastening each fastening bolt 33d to each first left counterweight attachment hole 33a or each second left counterweight attachment hole 33b.

Further, a right rear lamp 34 is attached to the right counterweight 32. In the present embodiment, the right rear lamp 34 is attached to the rear surface of the right counterweight 32. As shown in FIGS. 3A and 4A, the right rear lamp 34 is located inside the outer edge of the right counter weight 32 when the right counter weight 32 is viewed from the front. Accordingly, the right rear lamp 34 does not protrude outside the right counterweight 32.

Similarly, a left rear lamp 35 is attached to the left counterweight 33. In the present embodiment, the left rear lamp 35 is attached to the rear surface of the left counterweight 33. As shown in FIGS. 3A and 4A, the left rear lamp 35 is located inside the outer edge of the left counterweight 33 when the left counterweight 33 is viewed from the front. Therefore, the left rear lamp 35 does not protrude outside the left counterweight 33.

It should be noted that a tail lamp, a blinker, a back lamp, and a brake lamp can be installed in each of the right rear lamp 34 and the left rear lamp 35. A common lamp may be used for the tail lamp and the brake lamp.

Here, as shown in FIG. 3A, when the right counterweight 32 is attached to the first right position and the left counterweight 33 is attached to the first left position, the right outer edge of the right rear lamp 34 from the right outermost side of the vehicle body. The distance W1 in the vehicle width direction is preferably 400 mm or less, and the distance W2 in the vehicle width direction from the left outermost side of the vehicle body to the left outer edge of the left rear lamp 35 is preferably 400 mm or less. As a result, the visibility of the wheel loader 1 can be improved and the safety standard in the automobile inspection registration system required by the laws of each country for traveling on public roads can be satisfied.

On the other hand, as shown in FIG. 4A, when the right counterweight 32 is attached to the second right position, the distance W3 in the vehicle width direction from the right outermost side of the vehicle body to the right outer edge of the right rear lamp 34 is larger than the distance W1. large. The interval W3 may be 400 mm or less, or may be more than 400 mm. Similarly, as shown in FIG. 4A, when the left counterweight 33 is attached to the second left position, the distance W4 in the vehicle width direction from the left outermost side of the vehicle body to the left outer edge of the left rear lamp 35 is greater than the distance W2. Is also big. The interval W2 may be 400 mm or less, or may be more than 400 mm. Further, the right outermost side of the vehicle body may be the right edge of the bucket, and similarly, the left outermost side of the vehicle body may be the left edge of the bucket.

(Right harness 36 for right rear lamp 34)
Next, the handling of the right harness 36 connected to the right rear lamp 34 will be described with reference to the drawings. FIG. 5A is a cross-sectional view taken along the line AA of FIG. 3A. 5B is a cross-sectional view taken along the line BB of FIG. 4A.

As shown in FIGS. 5A and 5B, the right harness 36 is electrically connected to the right rear lamp 34. The right harness 36 is inserted into the right counterweight 32 and pulled out to the front of the right counterweight 32. Further, the right harness 36 is inserted into the right harness insertion hole 12 a formed in the right side plate 12.

The right harness insertion hole 12 a passes through the right side plate 12. The right harness insertion hole 12a is formed along the vehicle width direction. Therefore, the right harness insertion hole 12a can be used in common for handling the right harness 36 regardless of whether the right counterweight 32 is attached to the first right position or the second right position.

As shown in FIG. 5B, when the right counterweight 32 is attached to the second right position, the surplus portion of the right harness 36 can be accommodated inside the right side plate 12.

Although not shown, the left harness connected to the left rear lamp 35 is also inserted into the left harness insertion hole formed in the left side plate 13 in the same manner as the right harness 36.

(How to change the mounting position of the right counterweight 32 and the left counterweight 33)
Next, a method for changing the attachment position of the right counterweight 32 and the left counterweight 33 will be described. Here, the right counterweight 32 is attached to the first right position for running on a public road and the left counterweight 33 is attached to the first left position, and then the right counterweight 32 is attached to improve work efficiency at the work site. A case where the second counterweight 33 is attached to the second right position and the left counterweight 33 is attached to the second left position will be described.

First, the positions of the first right counterweight mounting holes 32a of the body frame 10 and the right bolt insertion holes 32c of the right counterweight 32 are aligned, and the fastening bolts 32d are connected to the first right counterweight mounting holes 32a. To conclude.

Subsequently, the positions of the first left counterweight mounting holes 33a of the body frame 10 and the left bolt insertion holes 33c of the left counterweight 33 are aligned, and the fastening bolts 33d are connected to the first left counterweight mounting holes. Fasten to 33a.

Thus, the right counterweight 32 is attached to the first right position, and the left counterweight 33 is attached to the first left position. Thereby, it can drive | work on a public road in the state which met safety standards.

Next, after arriving at the work site, the

counterweights

32 and 33 are removed from the vehicle body frame 10 by removing the fastening bolts 32d and the fastening bolts 33d.

Subsequently, the positions of the second right counterweight mounting holes 32b of the body frame 10 and the right bolt insertion holes 32c of the right counterweight 32 are aligned, and the fastening bolts 32d are connected to the second right counterweight mounting holes. Fasten to 32a.

Further, the positions of the second left counterweight mounting holes 33b of the vehicle body frame 10 and the left bolt insertion holes 33c of the left counterweight 33 are aligned, and the fastening bolts 33d are connected to the second left counterweight mounting holes 33b. To conclude.

Thus, the right counterweight 32 is attached to the second right position, and the left counterweight 33 is attached to the second left position. Thereby, since it can suppress that each

counterweight

32 and 33 interferes with a surrounding structure etc. in a work site, work efficiency can be improved.

(Characteristic)
(1) The vehicle body frame 10 is offset to the inner side in the vehicle width direction from the first right position, the first right counter weight mounting hole 32a for mounting the right counter weight 32 at the first right position to the right of the center line CL. A second right counter weight mounting hole 32b for mounting the right counter weight 32 at the second right position, and a first left counter weight mounting for mounting the left counter weight 33 at the first left position to the left of the center line CL. There is a hole 33a and a second left counterweight mounting hole 33b for mounting the left counterweight 33 at a second left position offset inward in the vehicle width direction from the first left position.

Therefore, the

counterweights

32 and 33 can be moved in the vehicle width direction according to the scene in which the wheel loader 1 is used. Therefore, the mounting positions of the

counterweights

32 and 33 can be changed according to whether the vehicle travels on a public road while satisfying the safety standards.

(2) The right side plate 12 of the vehicle body frame 10 has a right harness insertion hole 12a through which the right harness 36 is inserted.

Therefore, even if the mounting position of the right counterweight 32 is changed, the right harness insertion hole 12a can be commonly used for handling the right harness 36.

This effect can be similarly obtained by forming a left harness insertion hole in the left side plate 13 through which the left harness is inserted.

(3) The right rear lamp 34 is located inside the outer edge of the right counterweight 32 when the right counterweight 32 is viewed from the front.

Therefore, as compared with the case where the right rear lamp 34 protrudes to the outside of the right counterweight 32, the right rear lamp 34 can be prevented from being damaged due to contact with surrounding structures.

This effect can also be obtained in the same manner when the left rear lamp 35 is positioned inside the outer edge of the left counterweight 33.

(Other embodiments)
The present invention is not limited to the above-described embodiments, and various changes or modifications can be made without departing from the scope of the present invention.

In the above embodiment, the rear plate 11 has a first right counterweight mounting hole 32a, a second right counterweight mounting hole 32b, a first left counterweight mounting hole 33a, and a second left counterweight mounting hole 33b. Although three of each is formed, the present invention is not limited to this. The number of each mounting hole is not particularly limited, and the number may be different for each mounting hole. However, each counterweight is preferably attached by at least two or more attachment holes.

In the above embodiment, the right rear lamp 34 is attached to the rear surface of the right counterweight 32, but the present invention is not limited to this. For example, the right rear lamp 34 may be disposed in a recess formed on the rear surface of the right counterweight 32. Further, the right rear lamp 34 may be attached to the upper surface, the lower surface, or the side surface of the right counterweight 32. Similarly, in the above embodiment, the left rear lamp 35 is attached to the rear surface of the left counterweight 33. However, the present invention is not limited to this.

In the above embodiment, each of the

counterweights

32 and 33 has one type of bolt insertion hole, and the rear plate 11 of the rear frame 3 has two types of left and right mounting holes. It is not a thing. The rear plate 11 may have one type of left and right mounting holes, and each

counterweight

32 and 33 may have two types of bolt insertion holes.

Specifically, as shown in FIG. 6A, the rear plate 11 has three right counterweight mounting holes 32e and three left counterweight mounting holes 33e. As shown in FIG. 6B, the right counterweight 32 has three first right bolt insertion holes 32f and three second right bolt insertion holes 32g. Each first right bolt insertion hole 32f is used when the right counterweight 32 is attached to the first right position (see FIG. 3), and each second right bolt insertion hole 32g places the right counterweight 32 in the second right position. Used when attached to (see FIG. 4). Further, as shown in FIG. 6B, the left counterweight 33 has three first left bolt insertion holes 33f and three second left bolt insertion holes 33g. Each first left bolt insertion hole 33f is used when the left counterweight 33 is attached to the first left position (see FIG. 3), and each second left bolt insertion hole 33g has the left counterweight 33 placed at the second left position. Used when attached to (see FIG. 4).

Thus, even when the rear plate 11 has one type of left and right mounting holes and each

counterweight

32, 33 has two types of bolt insertion holes, the scene in which the wheel loader 1 is used. Accordingly, the mounting positions of the

counterweights

32 and 33 can be changed.

1 Wheel loader 10 Body frame 11 Rear plate 12 Right side plate 13 Left side plate 13a Left harness insertion hole 24 Bucket 32 Right counter weight 32a First right counter weight mounting hole 32b Second right counter weight mounting hole 33 Left counter weight 33a First 1 Left counter weight mounting hole 33b Second left counter weight mounting hole 34 Right rear lamp 35 Left rear lamp 36 Right harness

Claims

Removing the right counterweight from the first right position located to the right of the vehicle width direction center of the body frame;
Removing the left counterweight from the first left position located to the left of the vehicle width direction center of the body frame;
Attaching the right counterweight to a second right position offset inward in the vehicle width direction from the first right position;
Attaching the left counterweight to a second left position offset inward in the vehicle width direction from the first left position;
A method for changing the mounting position of the counterweight.
Body frame,
A right counterweight detachably attached to the body frame;
A left counterweight detachably attached to the body frame;
With
The body frame is
A first right counterweight mounting hole for mounting the right counterweight at a first right position located to the right of the vehicle width direction center of the body frame;
A first left counterweight mounting hole for mounting the left counterweight at a first left position located to the left of the vehicle width direction center of the body frame;
A second right counterweight mounting hole for mounting the right counterweight at a second right position offset inward in the vehicle width direction from the first right position;
A second left counterweight mounting hole for mounting the left counterweight at a second left position offset inward in the vehicle width direction from the first left position;
Having
Wheel loader.
The body frame has a rear plate;
The rear plate has the first right counterweight mounting hole, the second right counterweight mounting hole, the first left counterweight mounting hole, and the second left counterweight mounting hole.
The wheel loader according to claim 2.
A right rear lamp attached to the right counterweight;
A right harness connected to the right rear lamp;
With
The vehicle body frame has a right plate having a right harness insertion hole through which the right harness is inserted.
The wheel loader according to claim 2 or 3.
A left rear lamp attached to the left counterweight;
A left harness connected to the left rear lamp;
With
The vehicle body frame has a left plate having a left harness insertion hole through which the left harness is inserted.
The wheel loader according to any one of claims 2 to 4.
A right rear lamp attached to the right counterweight;
A left rear lamp attached to the left counterweight;
With
In the front view of the right counterweight, the right rear lamp is located inside the outer edge of the right counterweight,
In the front view of the left counterweight, the left rear lamp is located inside the outer edge of the left counterweight.
The wheel loader according to claim 2 or 3.
Body frame,
A right counterweight detachably attached to the body frame;
A left counterweight detachably attached to the body frame;
With
The body frame is
A mounting hole for the right counterweight for mounting the right counterweight;
A left counterweight mounting hole for mounting the left counterweight;
Have
The right counterweight is
A first right bolt insertion hole for mounting the right counterweight at a first right mounting position to the right of the vehicle width direction center of the body frame;
A second right bolt insertion hole for attaching the right counterweight to a second right position offset inward in the vehicle width direction from the first right position;
Have
The left counterweight is
A first left bolt insertion hole for mounting the left counterweight at a first left mounting position to the left of the vehicle width direction center of the body frame;
A second left bolt insertion hole for attaching the left counterweight to a second left position offset inward in the vehicle width direction from the first left position;
Having
Wheel loader.
The body frame has a rear plate;
The rear plate includes the first right counterweight mounting hole, the second right counterweight mounting hole, the first left counterweight mounting hole, and the second left counterweight mounting hole.
The wheel loader according to claim 7.